tree a9b4693e9eba0b29f54078881c5676f9a7530ea7
parent 30d8c2828a07931f64d5b79607779a5dacadc597
author Bruce A. Mah <bmah@kitchenlab.org> 1493932602 -0700
committer Bruce A. Mah <bmah@es.net> 1493933633 -0700
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Fix a heap corruption issue leading to a server-side crash. (#564)

Commit 5ab2132c (PR #551) fixed, among other things, a memory
leak.  The solution, however, causes a hazard where a free() of
an invalid pointer can corrupt the heap.  We've observed this
fairly repeatably while running the test_commands.sh script on
CentOS 7.

To remedy this, we NULL out a pointer after the object it
pointed to has been free-d, just like a number of other similar
objects.

(cherry picked from commit 103d4318e85783b99d6984c091ea878fc0d844b2)